encStr = string_upper(argument0);
arr[0] = 'M';
arr[1] = 'A';
arr[2] = 'P';
arr[3] = 'L';
arr[4] = 'G';
arr[5] = 'S';
arr[6] = 'I';
arr[7] = 'J';
arr[8] = 'Z';
arr[9] = 'O';
num1 = string_char_at(encStr,1);
first = string(array_index_of(arr,num1));
num2 = string_char_at(encStr,5);
second = string(9-array_index_of(arr,num2));
return real(first+second)
